Water-valve for instantaneous water-heaters.



E. RUUD & H. S. HUMPHREY. .WATER VALVE FOR INSTANTANEOUS WATER HEATERS.

APPLICATION FILED SEPT-2B. I915.

Patented Feb. 26,1918.

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K 7 TT WITNESSES EDWIN BUUD, 0F PITTSBURGH,

KALAMAZOO, MICHIGAN, ASSIGNORS T0 RUUID MANUFACTURING COMPANY, OF

PITTSBURGH, PENNSYLVANIA, A CQRPORATION 0F NEW JERSEY.

WATER-VALVE FOR INSTANTANEOUS W'ATER-HEATERS.

reac es.

Specification of Letters Patent. 7

Original application filed June 15, 1915, Serial No. 34,250. Divided and this application filed September 28,

To all whom it may concern:

Be it known that we, EDWIN RUUD, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, and HERBERT S.

HUMPHREY, a citizen of the United States, and resident of Kalamazoo, in the county of Kalamazoo and State of Michigan, have invented certain new and useful improvements in later-Valves for Instantaneous Water-Heaters, the same being a division of our application filed June 15, 19l5, Serial No. 34,250,01? which the following 18 a specr fication.

This inventiorrhas particular reference to the water valve which serves to actuate the gas valve, opening the latter for the passage of gas to the burners when water is being delivered from the heater, and the primary object is to provide simple and el'licient means for passing Water to the heater through the water valve without interfering with the gas-valve operating function of the latter.

Under certain conditions it is desirable to embody the water valve in a packed piston, and in order to preserve the packing the arrangement should be such as to avoid movement of the packing over ports or offsets' in the casing in which it travels. To accomplish this the piston itself must be ported for the passage of water therethrough instead of therearound. The pres ent invention is immediately concerned with a valve control of eliieient and novel form for the piston port; also to improved means for rendering operative the gas-valve actuating stem.

1' he accompanying drawing is a view in vertical section of a water valve embodying the invention, the same being illustrated in connection with a conventional embodiment of gas valve.

Referring to the drawing, 1 designates a water valve casing having the cylindrical intermediate portion 2. One end of the casing is provided with a water inlet 3, and its opposite end with an outlet 4. As

here showrn the inlet end is closed by the removable head or cap 5 for gaining access to the valve mechanism. l ittingand movable within part 2 of the casing is piston 6 which is preferably provided with packing Serial No. 53,069. r

7, the arrangement being such that the piston completes its movement in opposite Patented lFeb. as, rare.

directions without causing the packing to traverse either the inlet or the outlet ports.

Adapted to be actuated by piston 6 is stem 8 of gas valve 10, the latter being conventionally shown as normally closing port 11 of gas chamber 12 under the influence of spring 13. The water and gas valve structures may be held in operative relation by any desired form of frame element or sup-- port such as bracket 14.

Piston 6 is formed with a central chamber 6, the bottom of which is centrally ported at 16, providing a seat for the upwardly opening check valve 17, the latter being held normally closed by coiled spring 21 interposed betweenthe valve andspider 20 which forms a top for the upper portion of chamber 6'.

The shank 24 of valve 17 extends through and is guidedby the seat-forming port 16, with the outer or lower extremity of the shank engaging the upper extremity of the gas-valve actuating stem 8.

In operation, upon opening a service line connected to casing outlet 4, the greater pressure from inlet 3 will depress the piston notwithstanding the resistance ofiered by spring 22, and when the valve shank 24: engages abutment 19 at the casing outlet check valve 17 is opened. When the pressures are again equalized at opposite sides of the piston, spring 22 returns the piston to normal position, with the check valve closed.

It is characteristic of the present embodiment that the force for opening the gas valve is transmitted through check valve 17, and as it is desirable that the gas valve should open in advance of admitting water to the service pipes, spring 21 is stouter than the gas-valve holding spring 13, whereby the check valve is maintained closed during the descent of piston 6 and until after the gas valve 10 has been opened.

We claim:

1. In a water valve for instantaneous water heaters, the combination of a casing having a water inlet and an outlet, a ported piston movable in the casing, a check valve for the piston port, means made effective by the movement of the piston for opening the check valve, a spring for opposing opening movement of the check valve, and a gasvalveactuating stem movable through the outlet portion of the casing -in line with said check valve and-adapted to be engaged and actuated by the. latter.

2. In a Water valvefor instantaneous Water heaters, the combinatlon of a casing having a water'inlet and an outlet, a ported p stonjmevable in the; caslng, a check valve for the piston port, a spring for opposing the opening movement of said check valve, a. gasvvalv'eactuating stein-movable in the casing and adapted ,to be engaged, and ac,- tuated by said check valve, and a spring for opposing movement of said stem, said latter spring beingweaker than the spring which opposes opening movement. of said check valve;

3., In a water valve for instantaneous water heaters, the combination of a casing having ar waterinlet and an outlet, a ported piston movable in they casing between its Copies of this patent may he obtained for ling the piston port, a gas valve actuating stem actuated by the check valve, and a vspring acting on said check valve for opposing movement of the piston relative to the check valve and stem.

5. In. a water valve for instantaneous water heaters, the combination of a casing having a water inlet and an outlet, a piston movable the casing and formed with a water passageway, a check valve within and controlling the passageway, a spring confined inthe passageway and holding the check valve normally closed, and a gasvalve actuating stein entered in the casing in line with and engaged by the valve and adapted to be actuated by the latter.

In testimony whereof we affix our signatures in presence of two witnesses.

EDlVT-N RUUD.

HERBERT S. HUMPHREY.

Witnesses for Edwin Ruud:

D. A. HARDIE, P. A. MIHM. Witnesses for Herbert S. Humphrey:

E. S. ELLIOTT, B. M. SCHEBER.

five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

